Rectangular Gullies Rectangular Untrapped Gulley is made to BS 5911-6:2021 specifications. Rubber insert to be installed into gulley traps for use with PVC pipes PVC pipe with rubber insert in Circular Gulley with Concrete Cover Slab. Cover Slabs are universally designed to receive most types of Gulley Grids Would you like to talk to us about your requirements? Contact Us Download our Concrete brochure Download